• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2020, Vol. 56 ›› Issue (8): 155-161.doi: 10.3901/JME.2020.08.155

• 可再生能源与工程热物理 • 上一篇    下一篇

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180°螺旋式Savonius风力机气动特性试验研究

朱建勇1,2, 刘沛清2   

  1. 1. 沈阳航空航天大学航空发动机学院 沈阳 110136;
    2. 北京航空航天大学流体力学教育部重点实验室 北京 100191
  • 收稿日期:2019-05-06 修回日期:2019-12-28 出版日期:2020-05-28 发布日期:2020-05-28
  • 通讯作者: 朱建勇(通信作者),男,1987年出生,博士,讲师。主要研究方向为风力机、螺旋桨等旋转流体机械气动优化设计与性能分析。E-mail:michellend@126.com
  • 作者简介:刘沛清,男,1960年出生,博士,教授,博士研究生导师。主要研究方向为流动分离与控制,大迎角空气动力学,飞行器气动布局等。E-mail:lpq@buaa.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(11272034)。

Experimental Study on Aerodynamic Characteristics of Helical Savonius Rotor with Twist of 180°

ZHU Jianyong1,2, LIU Peiqing2   

  1. 1. College of Aeroengine, Shenyang Aerospace University, Shenyang 110136;
    2. Key Laboratory of Fluid Mechanics, Ministry of Education, Beihang University, Beijing 100191
  • Received:2019-05-06 Revised:2019-12-28 Online:2020-05-28 Published:2020-05-28

摘要: 为了揭示雷诺数对S型风力机气动特性的影响规律以及常规S型风力机与180°螺旋式S型风力机气动特性的差异,采用理论分析和风洞试验手段开展研究。基于不同雷诺数下二维凹、凸面阻力系数气动数据,理论分析得出,当雷诺数超过104时,S型风力机的气动特性受雷诺数的影响较小。通过总结结构级数对S型风力机的影响规律,推测出螺旋式S型风力机的最大风能利用系数低于常规S型风力机。对旋转直径360 mm、高度800 mm和偏心距100 mm气动外形尺寸相同的常规和180°螺旋式S型风力机,在雷诺数1.26×105~2.21×105开展风洞试验验证理论分析的结论。此外,针对螺旋式S型风力机,还开展气动外形参数和在风力机端部施加端板流动控制的试验,试验结果得出较大的长宽比和端板流动控制均能明显提高风力机的风能利用系数和拓宽较大风能利用系数对应的尖速比范围。

关键词: 风能, 螺旋式S型风力机, 雷诺数, 气动特性, 流动控制, 风洞试验

Abstract: In order to find out the Reynolds number effect on aerodynamic characteristics for generalized Savonius wind turbine (i.e., various types of Savonius wind turbine)and aerodynamic characteristics differences between conventional Savonius wind turbine and helical Savonius wind turbine with a twist of 180°, theoretical analysis and wind tunnel test are used to carry out the research. Based on the Reynolds number effect on drag coefficients of convex and concave, the aerodynamic characteristics of generalized Savonius wind turbine is almost independent of Reynolds number when the Reynolds number exceeds 104. It is also inferred that the conventional Savonius wind turbine exhibits higher maximum averaged power coefficient than the helical one, by summing up the regularity of multi-staging effect. In order to testify the results of theoretical analysis, the conventional wind turbine and the helical one with the same aerodynamic shape with the rotation diameter of 360 mm, the height of 800 mm and the overlap of 100 mm are tested in low speed wind tunnel in Reynolds number range of 1.26×105-2.21×105. Moreover, the aerodynamic shapes effect and flow control of end plates on aerodynamic characteristics for the helical Savonius wind turbine also been are investigated, the experimental results indicate that both high aspect ratios of the wind turbine and the end plates could greatly increase the maximum averaged power coefficient and widen the range of tip speed ratios for relatively high power coefficient.

Key words: wind energy, helical Savonius wind turbine, Reynolds number, aerodynamic characteristics, flow control, wind tunnel test

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